thanks for you perspective. i have done the ps caps, input and output buffer opamps, voltage regulators and two resistors to nice improvement. i have not found a full spec breakdown of the shotskys, all the volume resistor values, etc and other caps, etc. but i can do the soldering if i know the parts. . suppose i could reverse engineer the values but i didn’t want to have the unit gutted for weeks. i love this preamp. i wonder how the aura will compete with stage 2.